Description: information leak within a KVM guest
References:
 https://www.openwall.com/lists/oss-security/2020/01/30/4
Notes:
 carnil> Issue present since 0b9f6c4615c99 ("x86/kvm: Support the vCPU
 carnil> preemption check") in 4.10-rc1. But might need double-check.
Bugs:
upstream: pending [8c6de56a42e0c657955e12b882a81ef07d1d073e, 1eff70a9abd46f175defafd29bc17ad456f398a7, 917248144db5d7320655dbb41d3af0b8a0f3d589, b043138246a41064527cf019a3d51d9f015e9796, a6bd811f1209fe1c64c9f6fd578101d6436c6b6e]
4.19-upstream-stable: needed
4.9-upstream-stable:
3.16-upstream-stable:
sid: needed
4.19-buster-security: needed
4.9-stretch-security:
3.16-jessie-security: